General Newtonian Primary

GENERAL NEWTONIAN PRIMARY

Common Newtonian-style telescope primary configurations: These knobs will fit most Newtonian reflectors made by Guan Sheng Optical, including GSO, Hardin Optical, Meade, and Zhumell models. Our knobs listed here have a screw diameter of 7 mm (collimation) and 6 mm (locking), and will usually fit your telescope if you select the knobs that match your scope’s aperture. If your screws are different, we can design custom knobs for your application. Contact us using the link at the bottom of this page for more information.

We also offer stronger primary mirror support springs so collimation is retained while the locking screws are backed off for collimation adjustment.

Products

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Knobs for 3-Vane Phillips Screw Secondary

Knobs for 3-Vane Phillips Screw Secondary


Our price: $20.95 (€18.23)
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Knobs for 4-Vane Phillips Screw Secondary

Knobs for 4-Vane Phillips Screw Secondary


Our price: $20.95 (€18.23)
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Knobs for Newtonian 10” Primary

Knobs for Newtonian 10” Primary


Our price: $29.95 (€26.06)
Quantity
Knobs for Newtonian 12” Primary

Knobs for Newtonian 12” Primary


Our price: $29.95 (€26.06)
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Knobs for Newtonian 8” Primary

Knobs for Newtonian 8” Primary


Our price: $29.95 (€26.06)
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Knobs for Set Screw Secondary

Knobs for Set Screw Secondary


Our price: $20.95 (€18.23)
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Springs for Common Newtonian 8”, 10”, and 12” Primary

Springs for Common Newtonian 8”, 10”, and 12” Primary


Our price: $16.95 (€14.75)
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